Volume 1, Issue 1, July 2006
http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/1466
2024-03-28T19:10:05ZUSING GEOINFORMATION TECHNOLOGY TO DEVELOP A VULNERABILITY ASSESSMENT MODEL IN NATURAL DISASTER-PRONE AREAS
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/445
USING GEOINFORMATION TECHNOLOGY TO DEVELOP A VULNERABILITY ASSESSMENT MODEL IN NATURAL DISASTER-PRONE AREAS
Meenar, Md Mahbubur Rabb
Natural disasters are the consequences of
natural hazards. The devastation of any natural disaster
might get intensified by the unplanned rapid
urbanization in the hazard-prone areas. Although
natural hazards are inevitable, scientific knowledge and
technology can be used to minimize or even control the
damage. Geoinformation technology, which includes
Geographic Information Systems, Global Positioning
System, Satellite Communication, Remote Sensing, and
World Wide Web, can be used in natural disaster
assessment, prevention, and mitigation. The technology
is usually applied in three temporal stages of disaster
cycles: before, during, and after. The author discusses
the geospatial data needs for various disaster analyses
and presents a model to perform the vulnerability
assessment in single- or multi-hazard prone areas.
2006-07-01T00:00:00ZA STUDY ON THE STIRLING GENERATOR: PRODUCING BIOELECTRICITY
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/444
A STUDY ON THE STIRLING GENERATOR: PRODUCING BIOELECTRICITY
Chowdhury, Md. Shahzada; Kornbluth, Kurt
The technology for harnessing power and heat from biomass fuels is already available. Electricity generation from biomass fuels currently uses the same basic technology used in power plants that burn solid fossil fuels. However, new technologies are being developed to improve power production efficiency from biomass. The potential also exists for local sources of electricity production from biomass by using small-scale gasification plants or systems involving fermentation of biomass. By factoring in the pollution-related environmental and social costs generated by fossil and nuclear fuels, bioelectricity becomes a competitive energy source. Here a Stirling generator was used to produce electricity of small scale using biogas as a fuel. The study was done in such a manner that one can get an idea of the internal incidents of the generator such as: different temperatures, engine speed, blower speed, engine power, oxygen sensor data etc. Also a PCA (Portable Combustion Analyzer) of BACHARACH brand was used to investigate the amount of CO, CF (Carbon Monoxide content referenced to 0% O2), O2, and CO2 in the exhaust gas and also the temperatures (ambient and stack), and percentage of combustion efficiency and excess air.
2006-07-01T00:00:00ZAN EVALUATION OF SOLID WASTE MANAGEMENT PRACTICE IN JAPAN
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/442
AN EVALUATION OF SOLID WASTE MANAGEMENT PRACTICE IN JAPAN
Moqsud, M. Azizul; Hayashi, Shigenori
This paper presents an evaluation of the
current solid waste management practice in Japan.
Because of limited space, the siting and construction of a
new solid waste management (SWM) facility is a big
challenge in Japan. A SWM facility should be socially
accepted as well as environmentally and economically
sound. So it is considered to be one of the most serious
environmental problems confronting urban areas both in
developed and developing countries. From the physical
characteristics analysis of solid waste in Japan it is
shown that about 68% of the total waste is inorganic
which has good recycle value. Now-a-days, about 55%
of total paper, 78-83% of metal cans and 22.8% of
polyethylene terephthalate (PET) bottles are recycled in
Japan. At present 20.3% of total solid waste is land
filled, including ash from incineration. Approximately
75% of the gross amount of municipal solid waste that
Japan generates annually is incinerated providing an
estimated 2.5 million Kilowatts of electricity is
generated. The “waste management hierarchy”
(minimization, recovery, transformation and disposal)
has been adopted by Japan in recent times as the menu
for developing solid waste management strategies.
2006-07-01T00:00:00ZTECHNIQUES TO IMPROVE THE MAGNETORESISTANCE SENSITIVITY OF InSb THIN FILMS
http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/441
TECHNIQUES TO IMPROVE THE MAGNETORESISTANCE SENSITIVITY OF InSb THIN FILMS
Thin films of indium antimonide (InSb) were
deposited onto a well cleaned glass substrate by vacuum
evaporation technique using InSb compound as a source
material. The galvanomagnetic properties such as Hall
voltage, Hall mobility and magnetoresistance sensitivity
of the prepared films were investigated in terms of
annealing temperature. All the measurements were taken
at room temperature under the magnetic field from 0.1 T
to 1.0 T. It is observed that the magnetoresistance
sensitivity increases with the decrease of length to width
ratio of the specimen. The magnetoresistance sensitivity
of 85% was obtained for the film with the length to width
ratio of 0.8, annealed at a temperature of 470oC for 60
min. For further improvement of the sensitivity of the
film, indium (In) short-bar electrodes were deposited on
InSb film and a maximum sensitivity of 105% was
successfully achieved for the length to width ratio of 0.2
and magnetic field of 1.0 T.
2006-07-01T00:00:00Z